Title :
Peak Power Reduction in Closed-Loop MIMO-OFDM Systems via Mode Reservation
Author :
Zhang, Honglei ; Goeckel, Dennis L.
Author_Institution :
Massachusetts Univ., Boston
fDate :
7/1/2007 12:00:00 AM
Abstract :
This letter studies peak-to-average power ratio (PAPR) reduction for orthogonal frequency-division multiplexing (OFDM) signals in eigenbeamformed multiple antenna systems. The weak eigenmodes abandoned by the waterfilling allocation are intentionally filled in order to offset signal peaks in the time domain.Numerical results indicate that this method can significantly increase the efficiency of peak power constrained systems with no modification of the receiver required.
Keywords :
MIMO systems; OFDM modulation; antenna arrays; broadband networks; closed loop systems; eigenvalues and eigenfunctions; closed-loop MIMO-OFDM systems; eigenbeamformed multiple antenna; mode reservation; orthogonal frequency-division multiplexing; peak power reduction; waterfilling allocation; Array signal processing; Discrete Fourier transforms; Frequency division multiplexing; Helium; MIMO; Matrix decomposition; OFDM modulation; Peak to average power ratio; Receiving antennas; Transmitting antennas;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2007.070275
